66128364576 has 96 divisors (see below), whose sum is σ = 196513672320. Its totient is φ = 21626871552.

The previous prime is 66128364569. The next prime is 66128364667. The reversal of 66128364576 is 67546382166.

66128364576 is a `hidden beast` number, since 6 + 6 + 1 + 2 + 8 + 3 + 64 + 576 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676260 + ... + 767843.

It is an arithmetic number, because the mean of its divisors is an integer number (2047017420).

Almost surely, 2^66128364576 is an apocalyptic number.

It is an amenable number.

66128364576 is an abundant number, since it is smaller than the sum of its proper divisors (130385307744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66128364576 is a wasteful number, since it uses less digits than its factorization.

66128364576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444175 (or 1444161 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 66128364576 in words is "sixty-six billion, one hundred twenty-eight million, three hundred sixty-four thousand, five hundred seventy-six".